Enjoy year-round growing in an 8’ x 13’ Greenhouse Kit from WeatherPort Shelter Systems, the world’s premium fabric building manufacturer. When you choose a tensioned membrane greenhouse kit from WeatherPort, you get to enjoy: Incredible Long-Lasting Value, Easy Installation, Proven Design. Buy your 8’ x 13’ Greenhouse Kit today! Why WeatherPort? We believe in keeping jobs here in United States, employing hardworking Americans and proving that fabric buildings can truly be something more than just a “tent”. While other companies saturate the market with inexpensive alternatives made overseas, we handcraft American-made greenhouse structures using only the best materials, engineering and designs. It’s what we’ve done for almost 50 years.